var util = require('util');
function Base() {
    this.name = 'base';
    this.base = 1991;
    // this.sayHello = function() {
    //     console.log('Hello ' + this.name);
    // };
}
Base.prototype.showName = function() {
    console.log(this.name);
};
Base.prototype.sayHello = function() {
    console.log('Hello ' + this.name);
};

function Sub() {
    this.name = 'sub';
}
util.inherits(Sub, Base);
var objBase = new Base();
// objBase.showName();
// objBase.sayHello();
console.log(objBase);
var objSub = new Sub();
// objSub.showName();
// objSub.sayHello();
console.log(objSub);